Failed to make out going calls with Cause: 408 Request Timeout/INVITE from local

[rbachu]

Hi Team,
we have hosted the 3cx on aws and had created SIP trunk with twilio and made the configuration. Incoming calls is working good but the outgoing calls are failing with the below errors

Call to T:Line:10000>>+1xxxxxxxxx@[Dev:sip:[email protected]1.twilio.com:5060;transport=TLS] from L:7.1[Extn:1000] failed, cause: Cause: 408 Request Timeout/INVITE from local

Call(C:7): Call to <sip:[email protected]1.twilio.com:5060> has failed; Cause: 408 Request Timeout/INVITE from local

My env -

• 3CX Version,16.0.6
• Is the 3CX Server Hosted and where? Hosted at Amazon aws
• Trunk Provider : twilio
• Has the Firewall Checker passed: YES
• Are custom Phone Templates being used: YES

I am not seeing the call details or errors on the Twilio, seems like the call from the 3cx is not even getting initiated. on the detailed logs,

logs are as follows -

11/13/2020 7:23:09 PM - Default best-route IP is determined as x.x.x.x
11/13/2020 7:23:08 PM - Currently active calls - 1: [9]
11/13/2020 7:22:58 PM - Default best-route IP is determined as x.x.x.x
11/13/2020 7:22:57 PM - [CM503025]: Call(C:9): Calling T:Line:10000>>+1415xxxxxxx@[Dev:sip:[email protected]1.twilio.com:5060;transport=TLS] for L:9.1[Extn:1000]
11/13/2020 7:22:57 PM - Route to L:9.2[Line:10000>>+1415xxxxxxx] sends Invite-OUT Send Req INVITE from 54.172.60.0:5060 tid=0904751bda932526 Call-ID=Z8JrjWmk6mhHFN9pt_5Esw..:
INVITE sip:[email protected]1.twilio.com:5060;transport=TLS SIP/2.0
Via: SIP/2.0/ ;branch=z9hG4bK-524287-1---0904751bda932526;rport
Max-Forwards: 70
Contact: <sip:[email protected]:5061;transport=TLS>
To: <sip:[email protected]1.twilio.com:5060;transport=TLS>
From: <sip:[email protected]1.twilio.com:5060;transport=TLS>;tag=6500950f
Call-ID: Z8JrjWmk6mhHFN9pt_5Esw..
CSeq: 1 INVITE
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REGISTER, SUBSCRIBE, NOTIFY, REFER, INFO, MESSAGE, UPDATE
Content-Type: application/sdp
Supported: replaces, timer
User-Agent: 3CXPhoneSystem 16.0.6.655 (655)
P-Asserted-Identity: <sip:[email protected]1.twilio.com:5060>
Remote-Party-ID: <sip:[email protected]1.twilio.com:5060>;party=calling
Content-Length: 218

v=0
o=3cxPS 29004428757434368 8513782926016513 IN IP4 y.y.y.y
s=3cxPS Audio call
c=IN IP4 y.y.y.y
t=0 0
m=audio 9016 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=sendrecv

help me out with any suggestions..

 

[leejor]

Something similar (different provider), might be a starting place.

https://www.3cx.com/community/threads/unable-to-make-outbound-calls-via-voipvoip.63802/

 

[cobaltit]

Start over, using the 3CX template without changing anything and be sure to follow this guide:

https://www.3cx.com/docs/twilio-elastic-sip-trunking/

 

[rbachu]

Something similar (different provider), might be a starting place.

https://www.3cx.com/community/threads/unable-to-make-outbound-calls-via-voipvoip.63802/

Thanks leejor, this is more related to voipvoip. i check with my twilio and as per that the requests were not even reached the twilio. So, some thing i am missing in the configuration.

 

[rbachu]

Start over, using the 3CX template without changing anything and be sure to follow this guide:

https://www.3cx.com/docs/twilio-elastic-sip-trunking/

Thanks much cobaltit,
Yes followed the same steps. after completion, my inboud calls are working good. but not the outbound calls. As it is AWS hosted and is not 3cx hosted, do I need to do any additional configuration to the gateway?

 

[cobaltit]

The reason I ask is because post shows the trunk trying to use TLS but the neither the guide nor the template are configured for TLS so it appears to changed something.

 

[rbachu]

The reason I ask is because post shows the trunk trying to use TLS but the neither the guide nor the template are configured for TLS so it appears to changed something.

In the link, they have suggested to go to the twilio documentation. and also twilio supports only TLS for the secure trunking - https://www.twilio.com/docs/sip-trunking

 

[cobaltit]

3CX does not support it. I recommend following the 3CX guide and then once you get a working trunk, if you want to play with TLS go ahead.

https://www.3cx.com/docs/twilio-elastic-sip-trunking/